Its perfectly possible to use Agile in those situations, and some do. You can't manage whole projects using agile, because it only works on small teams. For building a aircraft for example, you may have an agile team developing firmware for specific part of the plane.
You develop strict tests, implement it in an agile way, then only let it pass to next stage once those tests are okaying it. In fact that's how you should do agile.
>>So I live in a world where everyone is currently chasing Agile
No, Agile is only for people where incremental improvement is possible in exchange of super cheap failures. People in construction businesses, space technology, medical electronics, micro processors, aircraft industry and many others would run into expensive disasters if they choose agile.